--- ray/src/hd/rhd_sample.h 1998/10/06 18:21:14 3.3 +++ ray/src/hd/rhd_sample.h 2003/07/14 22:24:00 3.10 @@ -1,40 +1,46 @@ -/* Copyright (c) 1998 Silicon Graphics, Inc. */ - -/* SCCSid "$SunId$ SGI" */ - +/* RCSid: $Id: rhd_sample.h,v 3.10 2003/07/14 22:24:00 schorsch Exp $ */ /* * Sample data structures for holodeck display drivers. + * + * Include after "standard.h" */ +#ifndef _RAD_RHD_SAMPLE_H_ +#define _RAD_RHD_SAMPLE_H_ + #include "color.h" #include "tonemap.h" #include "rhdriver.h" +#include "object.h" -#ifndef int2 -#define int2 short +#ifdef __cplusplus +extern "C" { #endif -#ifndef int4 -#define int4 int -#endif #ifndef INVALID #define INVALID -1 #endif +#define SFLOAT float + +typedef OBJECT S_ID; + +#define S_ID_MAX ((1 << ((sizeof(S_ID)<<3)-1))-1) + typedef struct samp { - float (*wp)[3]; /* world intersection point array */ - int4 *wd; /* world direction array */ -#ifndef HP_VERSION + SFLOAT (*wp)[3]; /* world intersection point array */ + int32 *wd; /* world direction array */ TMbright *brt; /* encoded brightness array */ -#endif BYTE (*chr)[3]; /* encoded chrominance array */ BYTE (*rgb)[3]; /* tone-mapped color array */ + int *info; /* Extra sample info */ + int *info1; /* Extra sample info */ int max_samp; /* maximum number of samples */ - int max_base_pt; /* maximum number of aux points */ - int next_base_pt; /* next auxilliary point to add */ - int replace_samp; /* next sample to free */ + int max_base_pt; /* maximum number of aux points */ + S_ID next_base_pt; /* next auxilliary point to add */ + S_ID replace_samp; /* next sample to free */ int num_samp; /* current number of samples */ - int tone_map; /* pointer to next value(s)t tonemap*/ - int free_samp; /* Available sample */ + S_ID tone_map; /* pointer to next value(s)t tonemap*/ + S_ID free_samp; /* next free sample */ char *base; /* base of allocated memory */ } SAMP; @@ -44,13 +50,15 @@ typedef struct samp { #define S_BRT(s) ((s)->brt) #define S_CHR(s) ((s)->chr) #define S_RGB(s) ((s)->rgb) +#define S_INFO(s) ((s)->info) +#define S_INFO1(s) ((s)->info1) #define S_MAX_SAMP(s) ((s)->max_samp) #define S_MAX_BASE_PT(s) ((s)->max_base_pt) #define S_NEXT_BASE_PT(s) ((s)->next_base_pt) #define S_REPLACE_SAMP(s) ((s)->replace_samp) #define S_NUM_SAMP(s) ((s)->num_samp) #define S_TONE_MAP(s) ((s)->tone_map) -#define S_FREE_SAMP(s) ((s)->free_samp) +#define S_FREE_SAMP(s) ((s)->free_samp) #define S_BASE(s) ((s)->base) #define S_MAX_POINTS(s) ((s)->max_base_pt) @@ -58,36 +66,91 @@ typedef struct samp { #define S_NTH_W_DIR(s,n) (S_W_DIR(s)[(n)]) #define S_NTH_RGB(s,n) (S_RGB(s)[(n)]) #define S_NTH_CHR(s,n) (S_CHR(s)[(n)]) -#ifndef HP_VERSION +#define S_NTH_INFO(s,n) (S_INFO(s)[(n)]) +#define S_NTH_INFO1(s,n) (S_INFO1(s)[(n)]) #define S_NTH_BRT(s,n) (S_BRT(s)[(n)]) -#endif + /* Sample Flag macros */ #define S_IS_FLAG(s) IS_FLAG(samp_flag,s) #define S_SET_FLAG(s) SET_FLAG(samp_flag,s) #define S_CLR_FLAG(s) CLR_FLAG(samp_flag,s) -#define sUnalloc_samp(s,sid) (S_FREE_SAMP(s) = sid) +#define S_NTH_NEXT(s,n) S_NTH_W_DIR(s,n) +#define sUnalloc_samp(s,n) (S_NTH_NEXT(s,n)=S_FREE_SAMP(s),S_FREE_SAMP(s)=n) #define sClear_base_points(s) (S_NEXT_BASE_PT(s) = S_MAX_SAMP(s)) #define sClear(s) sInit(s) -/* Max allowed angle of sample dir from current view */ -#define MAXANG 20 -#define MAXDIFF2 ( MAXANG*MAXANG * (PI*PI/180./180.)) +/* MAXDIFF2 Max allowed cos angle squared of sample dir from current view */ +/* In terms of cos: if angle is 30: MAXDIFF2 = cos(30)^2, if difference + is greater than this point not accepted on rebuild + */ +#define MAXDIFF2 0.75 +/* Max difference in direction for points at infinity: if over 45degrees + not accepted on rebuild cos(45) + */ +#define MAXDIR 0.70710678 +#define MAXQUALITY 10000 /* Maximum quality for rendering rep */ extern SAMP rsL; extern double sDepthEps; /* epsilon to compare depths (z fraction) */ -extern int4 encodedir(); /* Encodes FVECT direction */ +extern int32 encodedir(); /* Encodes FVECT direction */ extern void decodedir(); /* Decodes dir-> FVECT */ extern double fdir2diff(), dir2diff(); /* Compare dir and FVECT */ -extern int4 *samp_flag; /* Per/sample flags s */ +extern int32 *samp_flag; /* Per/sample flags s */ /* These values are set by the driver, and used in the OGL call for glFrustum*/ extern double dev_zmin,dev_zmax; - +extern S_ID sAdd_base_point(); extern SAMP *sAlloc(); +extern S_ID sAlloc_samp(); +/* + * int + * smInit(n) : Initialize/clear data structures for n entries + * int n; + * + * Initialize sampL and other data structures for at least n samples. + * If n is 0, then free data structures. Return number actually allocated. + * + * + * int + * smNewSamp(c, p, v) : register new sample point and return index + * COLR c; : pixel color (RGBE) + * FVECT p; : world intersection point + * FVECT v; : ray direction vector + * + * Add new sample point to data structures, removing old values as necessary. + * New sample representation will be output in next call to smUpdate(). + * + * + * int + * smFindSamp(orig, dir): intersect ray with 3D rep. and find closest sample + * FVECT orig, dir; + * + * Find the closest sample to the given ray. Return -1 on failure. + * + * + * smClean() : display has been wiped clean + * + * Called after display has been effectively cleared, meaning that all + * geometry must be resent down the pipeline in the next call to smUpdate(). + * + * + * smUpdate(vp, qua) : update OpenGL output geometry for view vp + * VIEW *vp; : desired view + * int qua; : quality level (percentage on linear time scale) + * + * Draw new geometric representation using OpenGL calls. Assume that the + * view has already been set up and the correct frame buffer has been + * selected for drawing. The quality level is on a linear scale, where 100% + * is full (final) quality. It is not necessary to redraw geometry that has + * been output since the last call to smClean(). (The last view drawn will + * be vp==&odev.v each time.) + */ - - +#ifdef __cplusplus +} +#endif +#endif /* _RAD_RHD_SAMPLE_H_ */